As I discussed with a few people over the last 2 weeks, I wanted to put up an audio test to see if I can capture some data among music lovers and audiophiles regarding MP3. Well... Here it is!
Below are the instructions... You can get the whole test package (music, instructions) from upload.to:
Feb 1, 2013 Update: The following links will be going down soon...
Original package:http://ul.to/ixt7vkgl
or
Feb 1, 2013 Update: The following links will be going down soon...
Original package:http://ul.to/ixt7vkgl
or
NEW tagged files (easier to integrate into music server):
(Thanks Abe!): FAST
(Upload.to): http://ul.to/a5wz1oh0
(FilePost): http://fp.io/588362aa/
or
TORRENT of the tagged files: Get Torrent File
BTW: Feel free to convert to ALAC/WAV/AIFF/etc. or use the Foobar ABX plugin...
(Thanks Abe!): FAST
(Upload.to): http://ul.to/a5wz1oh0
(FilePost): http://fp.io/588362aa/
or
TORRENT of the tagged files: Get Torrent File
BTW: Feel free to convert to ALAC/WAV/AIFF/etc. or use the Foobar ABX plugin...
-------------------------------------------
'Audiophile' High-Bitrate MP3
Audibility test:
Hello folks,
As "everybody" knows, MP3 quality is poor compared
to the original uncompressed source, right? Recently, there was a discussion on
Audio Asylum (hangout for a number of audiophiles:
http://www.audioasylum.com/index.html) about
the merits of MP3 in 2012. As expected, a number of respondents opined that
within seconds, even high bitrate MP3 (~320kbps) could be differentiated from
the original CD source due to the poor sound quality from lossy compression.
Thus was born the idea for this test... My hope is to obtain ANONYMOUS statistics from music lovers to see if:
1. It is true that high bit-rate MP3 can be differentiated
in a naturalistic setting (ie. in the comfort of your own home with your own
equipment).
2. There is any correlation between ability to differentiate
the sound quality with the equipment used (ie. would be great to gather info on
cost of equipment used and list of what was used to listen!).
I know over the years there have been many blind tests and
such, but I hope this isn't a stressful exercise. Have fun with it, maybe have
a little get together with audiophile friends and enjoy the evening while
listening.
-------
PROCEDURE----------
Your 'mission' (should you choose to accept):
In this ZIP are 3
songs in 2 Sets presented as
FLAC's. ONE of these Sets (either A *or* B) was processed extensively through
an MP3 encoder (LAME 3.99.5 – latest stable version) at a high bitrate
~320kbps:
1. "Time" from Pink Floyd off the 2011 re-master
of "Dark Side Of The Moon" - a 2.5 minute excerpt with all the ruckus
of chimes, bells and clocks in wonderful detail and space. A classic audiophile
test track. DR11 - good dynamic range for a remaster in the 21st century.
2. "Church" from Lyle Lovett off his 1992 record
"Joshua Judges Ruth". Even if you're not into country music, this
track has plenty of layered vocals, hand clapping, and a choir to appreciate.
IMO the early 90's resulted in some awesome recording and mastering efforts. DR16 here folks... About as dynamic as you'll ever hear off a
CD!
3. "Keine Zeit" from Megaherz off the recent 2012
album "Götterdämmerung". About as heavy as they come! Recommended by a resident metalhead on Audio
Asylum who feels this would strain MP3 encoding. DR6 is typical of recent
releases.
Have a listen to each
Set, remember ALL three songs were processed the same way for each Set, so if you think "Time_X" is an MP3
encode, then "Church_X" and "KeineZeit_X" (X = either A or B in this case) must also be MP3 processed.
I know the temptation is there for many, but please do NOT open up the
audio files with a file editor until you’ve had a good listen and completed the
survey! We listen with our ears, not with our eyes, right :-)?
Once you have listened, come fill out the ANONYMOUS survey – EVEN/ESPECIALLY IF YOU DO NOT HEAR A
DIFFERENCE! (only 6 questions):
I will report on the results of this survey in about 2
months (February 2013) on my blog including analysis to give everyone time to
listen as well as specifics on the bit rate and how I molested the files
through the MP3 encoder!
Happy listening and happy holidays everyone!
-------------------------
Note that the procedure and testing is purely for research /
educational purposes. The audio files are partial segments borrowed with no
intent or opportunity for any financial gain on my part. Please erase the audio
files once testing is over and if you enjoyed the music, purchase the
respective CD's as described above. Thank you!